/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSimulator Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.IO;
using System.Net;
using System.Net.Security;
using System.Web;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Xml;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using OpenMetaverse;
using log4net;
using Nini.Config;
using Nwc.XmlRpc;
using OpenSim.Framework;
using OpenSim.Framework.Communications.Cache;
using OpenSim.Framework.Capabilities;
using OpenSim.Framework.Servers;
using OpenSim.Framework.Servers.HttpServer;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
using Caps = OpenSim.Framework.Capabilities.Caps;
using System.Text.RegularExpressions;


namespace OpenSim.Region.OptionalModules.Avatar.Voice.FreeSwitchVoice
{
    public class FreeSwitchVoiceModule : IRegionModule
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        private bool UseProxy = false;

        // Capability string prefixes
        private static readonly string m_parcelVoiceInfoRequestPath = "0007/";
        private static readonly string m_provisionVoiceAccountRequestPath = "0008/";
        private static readonly string m_chatSessionRequestPath = "0009/";

        // Control info
        private static bool   m_WOF = true;
        private static bool   m_pluginEnabled  = false;

        // FreeSwitch server is going to contact us and ask us all
        // sorts of things.
        private static string m_freeSwitchServerUser;
        private static string m_freeSwitchServerPass;

        // SLVoice client will do a GET on this prefix
        private static string m_freeSwitchAPIPrefix;

        // We need to return some information to SLVoice 
        // figured those out via curl
        // http://vd1.vivox.com/api2/viv_get_prelogin.php
        //
        // need to figure out whether we do need to return ALL of
        // these...
        private static string m_freeSwitchRealm;
        private static string m_freeSwitchSIPProxy;
        private static bool m_freeSwitchAttemptUseSTUN;
        private static string m_freeSwitchSTUNServer;
        private static string m_freeSwitchEchoServer;
        private static int m_freeSwitchEchoPort;
        private static string m_freeSwitchDefaultWellKnownIP;
        private static int m_freeSwitchDefaultTimeout;
        // private static int m_freeSwitchSubscribeRetry;
        private static string m_freeSwitchUrlResetPassword;
        // private static IPEndPoint m_FreeSwitchServiceIP;
        private int m_freeSwitchServicePort;
        private string m_openSimWellKnownHTTPAddress;

        private FreeSwitchDirectory m_FreeSwitchDirectory;
        private FreeSwitchDialplan m_FreeSwitchDialplan;

        private readonly Dictionary<string, string> m_UUIDName = new Dictionary<string, string>();
        

        private IConfig m_config;

        public void Initialise(Scene scene, IConfigSource config)
        {

            m_config = config.Configs["FreeSwitchVoice"];

            if (null == m_config)
            {
                m_log.Info("[FreeSwitchVoice] no config found, plugin disabled");
                return;
            }

            if (!m_config.GetBoolean("enabled", false))
            {
                m_log.Info("[FreeSwitchVoice] plugin disabled by configuration");
                return;
            }

            // This is only done the FIRST time this method is invoked.
            if (m_WOF)
            {
                m_pluginEnabled = true;
                m_WOF = false;

                try
                {
                    m_freeSwitchServerUser = m_config.GetString("freeswitch_server_user", String.Empty);
                    m_freeSwitchServerPass = m_config.GetString("freeswitch_server_pass", String.Empty);
                    m_freeSwitchAPIPrefix = m_config.GetString("freeswitch_api_prefix", String.Empty);
                    
                    // XXX: get IP address of HTTP server. (This can be this OpenSim server or another, or could be a dedicated grid service or may live on the freeswitch server)
                     
                    string serviceIP = m_config.GetString("freeswitch_service_server", String.Empty);
                    int servicePort = m_config.GetInt("freeswitch_service_port", 80);
                    IPAddress serviceIPAddress = IPAddress.Parse(serviceIP);
                    // m_FreeSwitchServiceIP = new IPEndPoint(serviceIPAddress, servicePort);
                    m_freeSwitchServicePort = servicePort;
                    m_freeSwitchRealm = m_config.GetString("freeswitch_realm", String.Empty);
                    m_freeSwitchSIPProxy = m_config.GetString("freeswitch_sip_proxy", m_freeSwitchRealm);
                    m_freeSwitchAttemptUseSTUN = m_config.GetBoolean("freeswitch_attempt_stun", true);
                    m_freeSwitchSTUNServer = m_config.GetString("freeswitch_stun_server", m_freeSwitchRealm);
                    m_freeSwitchEchoServer = m_config.GetString("freeswitch_echo_server", m_freeSwitchRealm);
                    m_freeSwitchEchoPort = m_config.GetInt("freeswitch_echo_port", 50505);
                    m_freeSwitchDefaultWellKnownIP = m_config.GetString("freeswitch_well_known_ip", m_freeSwitchRealm);
                    m_openSimWellKnownHTTPAddress = m_config.GetString("opensim_well_known_http_address", serviceIPAddress.ToString());
                    m_freeSwitchDefaultTimeout = m_config.GetInt("freeswitch_default_timeout", 5000);
                    // m_freeSwitchSubscribeRetry = m_config.GetInt("freeswitch_subscribe_retry", 120);
                    m_freeSwitchUrlResetPassword = m_config.GetString("freeswitch_password_reset_url", String.Empty);
                    
                    if (String.IsNullOrEmpty(m_freeSwitchServerUser) ||
                        String.IsNullOrEmpty(m_freeSwitchServerPass) ||
                        String.IsNullOrEmpty(m_freeSwitchRealm) ||
                        String.IsNullOrEmpty(m_freeSwitchAPIPrefix))
                    {
                        m_log.Error("[FreeSwitchVoice] plugin mis-configured");
                        m_log.Info("[FreeSwitchVoice] plugin disabled: incomplete configuration");
                        return;
                    }

                    // set up http request handlers for
                    // - prelogin: viv_get_prelogin.php
                    // - signin: viv_signin.php
                    // - buddies: viv_buddy.php
                    // - ???: viv_watcher.php
                    // - signout: viv_signout.php
                    if (UseProxy)
                    {
                        scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/", m_freeSwitchAPIPrefix),
                                ForwardProxyRequest);
                    }
                    else
                    {
                        scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/viv_get_prelogin.php", m_freeSwitchAPIPrefix),
                                                             FreeSwitchSLVoiceGetPreloginHTTPHandler);
                                                             
                        // RestStreamHandler h = new
                        // RestStreamHandler("GET", 
                        // String.Format("{0}/viv_get_prelogin.php", m_freeSwitchAPIPrefix), FreeSwitchSLVoiceGetPreloginHTTPHandler);
                        //  scene.CommsManager.HttpServer.AddStreamHandler(h);



                        scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/viv_signin.php", m_freeSwitchAPIPrefix),
                                         FreeSwitchSLVoiceSigninHTTPHandler);

                        // set up http request handlers to provide
                        // on-demand FreeSwitch configuration to
                        // FreeSwitch's mod_curl_xml
                        scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/freeswitch-config", m_freeSwitchAPIPrefix),
                                                             FreeSwitchConfigHTTPHandler);

                        scene.CommsManager.HttpServer.AddHTTPHandler(String.Format("{0}/viv_buddy.php", m_freeSwitchAPIPrefix),
                                         FreeSwitchSLVoiceBuddyHTTPHandler);
                    }
                    
                    


                    
                    m_log.InfoFormat("[FreeSwitchVoice] using FreeSwitch server {0}", m_freeSwitchRealm);
                    
                    m_FreeSwitchDirectory = new FreeSwitchDirectory();
                    m_FreeSwitchDialplan = new FreeSwitchDialplan();

                    m_pluginEnabled = true;
                    m_WOF = false;

                    m_log.Info("[FreeSwitchVoice] plugin enabled");
                }
                catch (Exception e)
                {
                    m_log.ErrorFormat("[FreeSwitchVoice] plugin initialization failed: {0}", e.Message);
                    m_log.DebugFormat("[FreeSwitchVoice] plugin initialization failed: {0}", e.ToString());
                    return;
                }
            }

            if (m_pluginEnabled) 
            {
                // we need to capture scene in an anonymous method
                // here as we need it later in the callbacks
                scene.EventManager.OnRegisterCaps += delegate(UUID agentID, Caps caps)
                    {
                        OnRegisterCaps(scene, agentID, caps);
                    };

                try
                {
                    ServicePointManager.ServerCertificateValidationCallback += CustomCertificateValidation;
                }
                catch (NotImplementedException)
                {
                    try
                    {
#pragma warning disable 0612, 0618
                        // Mono does not implement the ServicePointManager.ServerCertificateValidationCallback yet!  Don't remove this!
                        ServicePointManager.CertificatePolicy = new MonoCert();
#pragma warning restore 0612, 0618
                    }
                    catch (Exception)
                    {
                        m_log.Error("[FreeSwitchVoice]: Certificate validation handler change not supported.  You may get ssl certificate validation errors teleporting from your region to some SSL regions.");
                    }
                }
                
            }
        }
        
        public void PostInitialise()
        {
        }

        public void Close()
        {
        }

        public string Name
        {
            get { return "FreeSwitchVoiceModule"; }
        }

        public bool IsSharedModule
        {
            get { return true; }
        }

        
        // <summary>
        // OnRegisterCaps is invoked via the scene.EventManager
        // everytime OpenSim hands out capabilities to a client
        // (login, region crossing). We contribute two capabilities to
        // the set of capabilities handed back to the client:
        // ProvisionVoiceAccountRequest and ParcelVoiceInfoRequest.
        // 
        // ProvisionVoiceAccountRequest allows the client to obtain
        // the voice account credentials for the avatar it is
        // controlling (e.g., user name, password, etc).
        // 
        // ParcelVoiceInfoRequest is invoked whenever the client
        // changes from one region or parcel to another.
        //
        // Note that OnRegisterCaps is called here via a closure
        // delegate containing the scene of the respective region (see
        // Initialise()).
        // </summary>
        public void OnRegisterCaps(Scene scene, UUID agentID, Caps caps)
        {
            m_log.DebugFormat("[FreeSwitchVoice] OnRegisterCaps: agentID {0} caps {1}", agentID, caps);

            string capsBase = "/CAPS/" + caps.CapsObjectPath;
            caps.RegisterHandler("ProvisionVoiceAccountRequest",
                                 new RestStreamHandler("POST", capsBase + m_provisionVoiceAccountRequestPath,
                                                       delegate(string request, string path, string param,
                                                                OSHttpRequest httpRequest, OSHttpResponse httpResponse)
                                                       {
                                                           return ProvisionVoiceAccountRequest(scene, request, path, param,
                                                                                               agentID, caps);
                                                       }));
            caps.RegisterHandler("ParcelVoiceInfoRequest",
                                 new RestStreamHandler("POST", capsBase + m_parcelVoiceInfoRequestPath,
                                                       delegate(string request, string path, string param,
                                                                OSHttpRequest httpRequest, OSHttpResponse httpResponse)
                                                       {
                                                           return ParcelVoiceInfoRequest(scene, request, path, param,
                                                                                         agentID, caps);
                                                       }));
            caps.RegisterHandler("ChatSessionRequest",
                                 new RestStreamHandler("POST", capsBase + m_chatSessionRequestPath,
                                                       delegate(string request, string path, string param,
                                                                OSHttpRequest httpRequest, OSHttpResponse httpResponse)
                                                       {
                                                           return ChatSessionRequest(scene, request, path, param,
                                                                                     agentID, caps);
                                                       }));
        }

        /// <summary>
        /// Callback for a client request for Voice Account Details
        /// </summary>
        /// <param name="scene">current scene object of the client</param>
        /// <param name="request"></param>
        /// <param name="path"></param>
        /// <param name="param"></param>
        /// <param name="agentID"></param>
        /// <param name="caps"></param>
        /// <returns></returns>
        public string ProvisionVoiceAccountRequest(Scene scene, string request, string path, string param,
                                                   UUID agentID, Caps caps)
        {
            ScenePresence avatar = scene.GetScenePresence(agentID);
            if (avatar == null)
            {
                System.Threading.Thread.Sleep(2000);
                avatar = scene.GetScenePresence(agentID);
                
                if (avatar == null)
                    return "<llsd>undef</llsd>";
            }
            string avatarName = avatar.Name;

            try
            {
                m_log.DebugFormat("[FreeSwitchVoice][PROVISIONVOICE]: request: {0}, path: {1}, param: {2}",
                                  request, path, param);

                //XmlElement    resp;
                string agentname = "x" + Convert.ToBase64String(agentID.GetBytes());
                string password  = "1234";//temp hack//new UUID(Guid.NewGuid()).ToString().Replace('-','Z').Substring(0,16);

                // XXX: we need to cache the voice credentials, as
                // FreeSwitch is later going to come and ask us for
                // those
                agentname = agentname.Replace('+', '-').Replace('/', '_');

                lock (m_UUIDName)
                {
                    if (m_UUIDName.ContainsKey(agentname))
                    {
                        m_UUIDName[agentname] = avatarName;
                    }
                    else
                    {
                        m_UUIDName.Add(agentname, avatarName);
                    }
                }

                // LLSDVoiceAccountResponse voiceAccountResponse =
               //     new LLSDVoiceAccountResponse(agentname, password, m_freeSwitchRealm, "http://etsvc02.hursley.ibm.com/api");
               LLSDVoiceAccountResponse voiceAccountResponse =
                   new LLSDVoiceAccountResponse(agentname, password, m_freeSwitchRealm,
                                                String.Format("http://{0}:{1}{2}/", m_openSimWellKnownHTTPAddress, 
                                                              m_freeSwitchServicePort, m_freeSwitchAPIPrefix)); 

                string r = LLSDHelpers.SerialiseLLSDReply(voiceAccountResponse);

                m_log.DebugFormat("[FreeSwitchVoice][PROVISIONVOICE]: avatar \"{0}\": {1}", avatarName, r);

                return r;
            }
            catch (Exception e)
            {
                m_log.ErrorFormat("[FreeSwitchVoice][PROVISIONVOICE]: avatar \"{0}\": {1}, retry later", avatarName, e.Message);
                m_log.DebugFormat("[FreeSwitchVoice][PROVISIONVOICE]: avatar \"{0}\": {1} failed", avatarName, e.ToString());

                return "<llsd>undef</llsd>";
            }
        }

        /// <summary>
        /// Callback for a client request for ParcelVoiceInfo
        /// </summary>
        /// <param name="scene">current scene object of the client</param>
        /// <param name="request"></param>
        /// <param name="path"></param>
        /// <param name="param"></param>
        /// <param name="agentID"></param>
        /// <param name="caps"></param>
        /// <returns></returns>
        public string ParcelVoiceInfoRequest(Scene scene, string request, string path, string param,
                                             UUID agentID, Caps caps)
        {
            ScenePresence avatar = scene.GetScenePresence(agentID);
            string avatarName = avatar.Name;

            // - check whether we have a region channel in our cache
            // - if not: 
            //       create it and cache it
            // - send it to the client
            // - send channel_uri: as "sip:regionID@m_sipDomain"
            try
            {
                LLSDParcelVoiceInfoResponse parcelVoiceInfo;
                string channelUri;

                if (null == scene.LandChannel) 
                    throw new Exception(String.Format("region \"{0}\": avatar \"{1}\": land data not yet available",
                                                      scene.RegionInfo.RegionName, avatarName));



                // get channel_uri: check first whether estate
                // settings allow voice, then whether parcel allows
                // voice, if all do retrieve or obtain the parcel
                // voice channel
                LandData land = scene.GetLandData(avatar.AbsolutePosition.X, avatar.AbsolutePosition.Y);

                m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": Parcel \"{1}\" ({2}): avatar \"{3}\": request: {4}, path: {5}, param: {6}",
                                  scene.RegionInfo.RegionName, land.Name, land.LocalID, avatarName, request, path, param);

                // TODO: EstateSettings don't seem to get propagated...
                // if (!scene.RegionInfo.EstateSettings.AllowVoice)
                // {
                //     m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": voice not enabled in estate settings",
                //                       scene.RegionInfo.RegionName);
                //     channel_uri = String.Empty;
                // }
                // else

                if ((land.Flags & (uint)Parcel.ParcelFlags.AllowVoiceChat) == 0)
                {
                    m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": Parcel \"{1}\" ({2}): avatar \"{3}\": voice not enabled for parcel",
                                      scene.RegionInfo.RegionName, land.Name, land.LocalID, avatarName);
                    channelUri = String.Empty;
                }
                else
                {
                    channelUri = ChannelUri(scene, land);
                }

                // fill in our response to the client
                Hashtable creds = new Hashtable();
                creds["channel_uri"] = channelUri;

                parcelVoiceInfo = new LLSDParcelVoiceInfoResponse(scene.RegionInfo.RegionName, land.LocalID, creds);
                string r = LLSDHelpers.SerialiseLLSDReply(parcelVoiceInfo);

                m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": Parcel \"{1}\" ({2}): avatar \"{3}\": {4}", 
                                  scene.RegionInfo.RegionName, land.Name, land.LocalID, avatarName, r);
                return r;
            }
            catch (Exception e)
            {
                m_log.ErrorFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": avatar \"{1}\": {2}, retry later", 
                                  scene.RegionInfo.RegionName, avatarName, e.Message);
                m_log.DebugFormat("[FreeSwitchVoice][PARCELVOICE]: region \"{0}\": avatar \"{1}\": {2} failed", 
                                  scene.RegionInfo.RegionName, avatarName, e.ToString());

                return "<llsd>undef</llsd>";
            }
        }


        /// <summary>
        /// Callback for a client request for ChatSessionRequest
        /// </summary>
        /// <param name="scene">current scene object of the client</param>
        /// <param name="request"></param>
        /// <param name="path"></param>
        /// <param name="param"></param>
        /// <param name="agentID"></param>
        /// <param name="caps"></param>
        /// <returns></returns>
        public string ChatSessionRequest(Scene scene, string request, string path, string param,
                                         UUID agentID, Caps caps)
        {
            ScenePresence avatar = scene.GetScenePresence(agentID);
            string        avatarName = avatar.Name;

            m_log.DebugFormat("[FreeSwitchVoice][CHATSESSION]: avatar \"{0}\": request: {1}, path: {2}, param: {3}",
                              avatarName, request, path, param);
            return "<llsd>true</llsd>";
        }

        public Hashtable ForwardProxyRequest(Hashtable request)
        {
            m_log.Debug("[PROXYING]: -------------------------------proxying request");
            Hashtable response = new Hashtable();
            response["content_type"] = "text/xml";
            response["str_response_string"] = "";
            response["int_response_code"] = 200;

            string forwardaddress = "https://www.bhr.vivox.com/api2/";
            string body = (string)request["body"];
            string method = (string) request["http-method"];
            string contenttype = (string) request["content-type"];
            string uri = (string) request["uri"];
            uri = uri.Replace("/api/", "");
            forwardaddress += uri;


            string fwdresponsestr = "";
            int fwdresponsecode = 200;
            string fwdresponsecontenttype = "text/xml";
            

            HttpWebRequest forwardreq = (HttpWebRequest)WebRequest.Create(forwardaddress);
            forwardreq.Method = method;
            forwardreq.ContentType = contenttype;
            forwardreq.KeepAlive = false;

            if (method == "POST")
            {
                byte[] contentreq = Encoding.UTF8.GetBytes(body);
                forwardreq.ContentLength = contentreq.Length;
                Stream reqStream = forwardreq.GetRequestStream();
                reqStream.Write(contentreq, 0, contentreq.Length);
                reqStream.Close();
            }

            HttpWebResponse fwdrsp = (HttpWebResponse)forwardreq.GetResponse();
            Encoding encoding = Encoding.UTF8;
            StreamReader fwdresponsestream = new StreamReader(fwdrsp.GetResponseStream(), encoding);
            fwdresponsestr = fwdresponsestream.ReadToEnd();
            fwdresponsecontenttype = fwdrsp.ContentType;
            fwdresponsecode = (int)fwdrsp.StatusCode;
            fwdresponsestream.Close();

            response["content_type"] = fwdresponsecontenttype;
            response["str_response_string"] = fwdresponsestr;
            response["int_response_code"] = fwdresponsecode;
            
            return response;
        }


        public Hashtable FreeSwitchSLVoiceGetPreloginHTTPHandler(Hashtable request)
        {
            m_log.Debug("[FreeSwitchVoice] FreeSwitchSLVoiceGetPreloginHTTPHandler called");
            
            Hashtable response = new Hashtable();
            response["content_type"] = "text/xml";
            response["keepalive"] = false;
            
            response["str_response_string"] = String.Format(
                "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n" +
                "<VCConfiguration>\r\n"+
                    "<DefaultRealm>{0}</DefaultRealm>\r\n" +
                    "<DefaultSIPProxy>{1}</DefaultSIPProxy>\r\n"+
                    "<DefaultAttemptUseSTUN>{2}</DefaultAttemptUseSTUN>\r\n"+
                    "<DefaultEchoServer>{3}</DefaultEchoServer>\r\n"+
                    "<DefaultEchoPort>{4}</DefaultEchoPort>\r\n"+
                    "<DefaultWellKnownIP>{5}</DefaultWellKnownIP>\r\n"+
                    "<DefaultTimeout>{6}</DefaultTimeout>\r\n"+
                    "<UrlResetPassword>{7}</UrlResetPassword>\r\n"+
                    "<UrlPrivacyNotice>{8}</UrlPrivacyNotice>\r\n"+
                    "<UrlEulaNotice/>\r\n"+
                    "<App.NoBottomLogo>false</App.NoBottomLogo>\r\n"+
                "</VCConfiguration>",
                m_freeSwitchRealm, m_freeSwitchSIPProxy, m_freeSwitchAttemptUseSTUN,
                m_freeSwitchSTUNServer, m_freeSwitchEchoServer, m_freeSwitchEchoPort,
                m_freeSwitchDefaultWellKnownIP, m_freeSwitchDefaultTimeout, 
                m_freeSwitchUrlResetPassword, "");
            
            response["int_response_code"] = 200;

            m_log.DebugFormat("[FreeSwitchVoice] FreeSwitchSLVoiceGetPreloginHTTPHandler return {0}",response["str_response_string"]);
            return response;
        }

        public Hashtable FreeSwitchSLVoiceBuddyHTTPHandler(Hashtable request)
        {
            Hashtable response = new Hashtable();
            response["int_response_code"] = 200;
            response["str_response_string"] = string.Empty;
            response["content-type"] = "text/xml";

            Hashtable requestBody = parseRequestBody((string)request["body"]);
            
            if (!requestBody.ContainsKey("auth_token"))
                return response;

            string auth_token = (string)requestBody["auth_token"];
            //string[] auth_tokenvals = auth_token.Split(':');
            //string username = auth_tokenvals[0];
            int strcount = 0;
            
            string[] ids = new string[strcount];

            int iter = -1;
            lock (m_UUIDName)
            {
                strcount = m_UUIDName.Count;
                ids = new string[strcount];
                foreach (string s in m_UUIDName.Keys)
                {
                    iter++;
                    ids[iter] = s;
                }
            }
            StringBuilder resp = new StringBuilder();
            resp.Append("<?xml version=\"1.0\" encoding=\"iso-8859-1\" ?><response xmlns=\"http://www.vivox.com\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation= \"/xsd/buddy_list.xsd\">");
            
            resp.Append(string.Format(@"<level0>
                        <status>OK</status>
                        <cookie_name>lib_session</cookie_name>
                        <cookie>{0}</cookie>
                        <auth_token>{0}</auth_token>
                        <body>
                            <buddies>",auth_token));
            /*
                        <cookie_name>lib_session</cookie_name>
                        <cookie>{0}:{1}:9303959503950::</cookie>
                        <auth_token>{0}:{1}:9303959503950::</auth_token>
            */
            for (int i=0;i<ids.Length;i++)
            {
                DateTime currenttime = DateTime.Now;
                string dt = currenttime.ToString("yyyy-MM-dd HH:mm:ss.0zz");
                resp.Append(
                    string.Format(@"<level3>
                                    <bdy_id>{1}</bdy_id>
                                    <bdy_data></bdy_data>
                                    <bdy_uri>sip:{0}@{2}</bdy_uri>
                                    <bdy_nickname>{0}</bdy_nickname>
                                    <bdy_username>{0}</bdy_username>
                                    <bdy_domain>{2}</bdy_domain>
                                    <bdy_status>A</bdy_status>
                                    <modified_ts>{3}</modified_ts>
                                    <b2g_group_id></b2g_group_id>
                                </level3>", ids[i],i,m_freeSwitchRealm,dt));
            }
                                                                
            resp.Append("</buddies><groups></groups></body></level0></response>");

            response["str_response_string"] = resp.ToString();
            Regex normalizeEndLines = new Regex(@"\r\n", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.Multiline);

            m_log.DebugFormat("[FREESWITCH]: {0}", normalizeEndLines.Replace((string)response["str_response_string"],""));
            return response;
        }

        public Hashtable FreeSwitchSLVoiceSigninHTTPHandler(Hashtable request)
        {
            m_log.Debug("[FreeSwitchVoice] FreeSwitchSLVoiceSigninHTTPHandler called");
            string requestbody = (string)request["body"];
            string uri = (string)request["uri"];
            string contenttype = (string)request["content-type"];
            
            Hashtable requestBody = parseRequestBody((string)request["body"]);

            //string pwd = (string) requestBody["pwd"];
            string userid = (string) requestBody["userid"];

            string avatarName = string.Empty;
            int pos = -1;
            lock (m_UUIDName)
            {
                if (m_UUIDName.ContainsKey(userid))
                {
                    avatarName = m_UUIDName[userid];
                    foreach (string s in m_UUIDName.Keys)
                    {
                        pos++;
                        if (s == userid)
                            break;
                        
                    }
                }
            }

            m_log.DebugFormat("[FreeSwitchVoice]: AUTH, URI: {0}, Content-Type:{1}, Body{2}", uri, contenttype,
                              requestbody);
            Hashtable response = new Hashtable();
            response["str_response_string"] = string.Format(@"<response xsi:schemaLocation=""/xsd/signin.xsd"">
                    <level0>
                        <status>OK</status>
                        <body>
                        <code>200</code>
                        <cookie_name>lib_session</cookie_name>
                        <cookie>{0}:{1}:9303959503950::</cookie>
                        <auth_token>{0}:{1}:9303959503950::</auth_token>
                        <primary>1</primary>
                        <account_id>{1}</account_id>
                        <displayname>{2}</displayname>
                        <msg>auth successful</msg>
                        </body>
                    </level0>
                </response>", userid, pos, avatarName);
            
            response["int_response_code"] = 200;
            return response;
            /*
            <level0>
               <status>OK</status><body><status>Ok</status><cookie_name>lib_session</cookie_name>
             * <cookie>xMj1QJSc7TA-G7XqcW6QXAg==:1290551700:050d35c6fef96f132f780d8039ff7592::</cookie>
             * <auth_token>xMj1QJSc7TA-G7XqcW6QXAg==:1290551700:050d35c6fef96f132f780d8039ff7592::</auth_token>
             * <primary>1</primary>
             * <account_id>7449</account_id>
             * <displayname>Teravus Ousley</displayname></body></level0>
            */
        }

        public Hashtable FreeSwitchConfigHTTPHandler(Hashtable request)
        {
            m_log.DebugFormat("[FreeSwitchVoice] FreeSwitchConfigHTTPHandler called with {0}", (string)request["body"]);
            
            Hashtable response = new Hashtable();
            response["str_response_string"] = string.Empty;
            // all the params come as NVPs in the request body
            Hashtable requestBody = parseRequestBody((string) request["body"]);

            // is this a dialplan or directory request 
            string section = (string) requestBody["section"];

            if (section == "directory")
                response = m_FreeSwitchDirectory.HandleDirectoryRequest(requestBody);
            else if (section == "dialplan")
                response = m_FreeSwitchDialplan.HandleDialplanRequest(requestBody);
            else
                m_log.WarnFormat("[FreeSwitchVoice]: section was {0}", section);
            
            // XXX: re-generate dialplan: 
            //      - conf == region UUID
            //      - conf number = region port
            //      -> TODO Initialise(): keep track of regions via events
            //      re-generate accounts for all avatars 
            //      -> TODO Initialise(): keep track of avatars via events
            Regex normalizeEndLines = new Regex(@"\r\n", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.Multiline);

            m_log.DebugFormat("[FreeSwitchVoice] FreeSwitchConfigHTTPHandler return {0}",normalizeEndLines.Replace(((string)response["str_response_string"]), ""));
            return response;
        }
        
        public Hashtable parseRequestBody(string body)
        {
            Hashtable bodyParams = new Hashtable();
            // split string
            string [] nvps = body.Split(new Char [] {'&'});

            foreach (string s in nvps) {
    
                if (s.Trim() != "")
                {
                    string [] nvp = s.Split(new Char [] {'='});
                    bodyParams.Add(HttpUtility.UrlDecode(nvp[0]), HttpUtility.UrlDecode(nvp[1]));
                }
            }
            
            return bodyParams;
        }

        private string ChannelUri(Scene scene, LandData land)
        {

            string channelUri = null;

            string landUUID;
            string landName;

            // Create parcel voice channel. If no parcel exists, then the voice channel ID is the same
            // as the directory ID. Otherwise, it reflects the parcel's ID.

            if (land.LocalID != 1 && (land.Flags & (uint)Parcel.ParcelFlags.UseEstateVoiceChan) == 0)
            {
                landName = String.Format("{0}:{1}", scene.RegionInfo.RegionName, land.Name);
                landUUID = land.GlobalID.ToString();
                m_log.DebugFormat("[FreeSwitchVoice]: Region:Parcel \"{0}\": parcel id {1}: using channel name {2}", 
                                  landName, land.LocalID, landUUID);
            }
            else
            {
                landName = String.Format("{0}:{1}", scene.RegionInfo.RegionName, scene.RegionInfo.RegionName);
                landUUID = scene.RegionInfo.RegionID.ToString();
                m_log.DebugFormat("[FreeSwitchVoice]: Region:Parcel \"{0}\": parcel id {1}: using channel name {2}", 
                                  landName, land.LocalID, landUUID);
            }
            System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
            channelUri = String.Format("sip:confctl-{0}@{1}", "x" + Convert.ToBase64String(encoding.GetBytes(landUUID)), m_freeSwitchRealm);
            
            //channelUri="sip:confctl-3001@9.20.151.43";
            //channelUri="sip:opensimconf-3001@9.20.151.43";

            return channelUri;
        }
        
        private static bool CustomCertificateValidation(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors error)
        {
            //if (cert.Subject == "E=root@lindenlab.com, CN=*.vaak.lindenlab.com, O=\"Linden Lab, Inc.\", L=San Francisco, S=California, C=US")
            //{
            return true;
            //}

            //return false;
        }
    }
    public class MonoCert : ICertificatePolicy
    {
        #region ICertificatePolicy Members

        public bool CheckValidationResult(ServicePoint srvPoint, X509Certificate certificate, WebRequest request, int certificateProblem)
        {
            return true;
        }

        #endregion
    }
}